Which satellite to add to RBR20?

[Caique1031]

I bought an Orbi RBR20 mesh system with one satellite but I need to add another. There’re so many satellite options. Which one do I choose for at least cost? It’s just to send WiFi around the corner from my kitchen to my living room in an L shaped house. We have little reception there.

[plemans]

compatible satellites?
RBS20

RBW30

RBS40

RBS40V (one we recommend a lot because its cheaper and has a speaker)

RBS50

RBS50Y (outdoor)

The triband series work but don't integrate. EX7500, EX7700, EX8000